Press cloth



Feb. 6, 1923. 1i, M1-,253

w. A. LEE.

PRESS CLOTH. FILED ocT.12,1921.

W/T/VESSES draulic Patented Feb. 6, 1923.

il? 'if WILLIAM .ANDREW LEE, OF AUGUSTA, GEORGIA.

PRESS CLOTH.

Application filed etober 12, 1921. SeriaINo. 507,316.

To all107mmtmfy-concewi Beit known that I, l/VILLIAM citizen of the United States, and a resident of Augusta, in the county of Richmond and State of Georgia, have invented certain new and useful Improvements in Press Cloths, of which the following is a specification.

My present invention relates generally to what are commonly known as press cloths, that is cloths used for the purpose of wrapping oleaginous seeds andother oil bearing material while the latter are pressed in hypresses, the press cloth acting as a filter through which the oil may be discharged andstill retain the meal or cake within the cloth.

It is a well known fact that cloths ordinarily formed of hair, jute or other textile fabric are comparatively short lived and that made up as they usually are byweaving twisted strands, the filtering in the main takes place between the twisted strands and not through the material of which the strands are formed.

My invention aims in the first place to provide a press cloth in which the usual hair or fabric filtering material is combined with metal in a manner which will bring about a greatly extended life of use as compared to the usual press cloths, and a further object is the provision of such an arrangement which permits the oil to be filtered between the fibers of a material as well asl between twisted strands thereof or a fabric-'made therefrom and one which will not only in,- crease the yield of oil but reduce the amount of meal or cake which passes the usual clot-h.` With the above objects in mind, my in-l vention resides in a press cloth constructed as shown in the accompanying drawings, which illustrate t-he invention and form a part of this specification and in which,

Figure l is a perspective View of a por tion of a press cloth constructed as proposed by my invention, v

Figure 2 is a longitudinal section through a portion thereof,

Figure 3 is a partial transverse section taken on line 3 3 of Figure 2,

Figure 4 is a detail perspective view of one of the tubular filtering material holders,

Figure 5 is a longitudinal section showing a slightly modified form,

Figure 6 is a perspective view of a pair of the holders constructed and joined as in Figure 5,

A. LEE, a.

Figure 7 is a perspective view of a section of press cloth showing another modifiedform,

Figure 8 is a partial transverse section taken on lineS-S of Figure 9, and,l

Figure 9 is a partial longitudinal section taken on line 9-9 of Figure 8.

Referring now to these figuresand particularly to F igureslto 4 inclusive I have shown a press cloth embodying a lengthwise series. of transversely disposed and flexibly joined tubular filtering material holders l0, each of these several holders being in the form of a flattened wire helix, the convolutions of' the wires being interengaged in overlapping relation as seen clearly by reference to Figure 2 to provide forthe reception of transversely disposed hinge pins or wires l1. v

The hinge pins l1 securing the several holders in their overlapping relation provide for maximum flexibility throughout the entire press cloth, that is in a lengthwise direction, the several holders and the several hinge pinsk or wires extending transversely in the press cloth so that with the natural yielding' qualities of wire joined in this way it is obvious the finished press cloth will be flexible to the extent of the re(- siliency of the wire even in a transverse direction. i

The term holders for the several flattened wire forms arises from the fact that through eachv wire helix the filtering material is packed, preferably by drawing the hair, jute or other material lengthwise through the holders so that the latter are completely filled and may if so desired be so filled without the necessityA of twisting the filtering material into strands as is done previous to the weaving of the usual all-fabric press cloths.A It is obvious` that in the first instance this filtering material, indicated at 12, may be drawn in sufficientY quantity through each,y of theholdersv so that the press cloth asa whole isfirst used, thepressure, which tends to slightly flatten the holders asorigi-nally formed, will pack the filtering material snuglyl around the hinge pins or4 wires-l1 so that thereafterin use there is little danger ofv escape ofany of the meal within the press cloth.

Instead of utilizing the hinge ins or wires 11 to form the flexible connections between the holders, the convolutions of the wire heldere may be interlccked, that is the convolutions of each holder being passed through the convolutions of the neXt adjacent holders as indicated in connection with the wire holders 13 shown in Figures 5 and 6, the filtering material 12 being passed through each holder as in Figure similarto the manner previously described. in connection with Figures l to l inclusive. Figure 6 clearly shows the inanner in which the convolutions of the wire holders are passed through one another so that they are flexibly connected without the necessity of additional parts. It of course obvious that the wire holders particularly in this form of the invention inay be constructed in cylindrical form in the first instance and afterwards flattened.

In Figures 7, 8 and 9 I have shown another possible form of the invention in which metal tubes llare utilized, the tubes being formed of a suitable metal and flattened, with their side edges castellated as l lindicated at l5 to provide for the reception of hinge pins or wires lo. These tubes la after flattening to the forni shown are perforated throughout, the perforations being indicated at 17 so that 'the filtering can take place freely` through the filtering ma teiial I8 through the holders `iust as previously described in connection with the wire forming holder. It is a well known fact that in the use of press cloths, the ends thereof are folded over the central portion, and although the in-etal holders id of the last described form of the invention may be made sufficiently narrow to provide for this folding, it is contemplated as possible 'that the complete press cloth may have flexible sections of the usual woven fabric and the like between central and end sections to allow of the proper folding` of thev cloth.

In any e-vent and with either of the forxns shown it is quite obvious that I ain enabled to' use filtering material in any desired forni within the holders, whereby the ytwo 1naterials as thus employed will increase efi- `ciency and obtain an oil in operation which is more pure and much more free-of small particles of the mat or cake than is usually the case.

It isy also obvious as tests have proven that a matas proposed by my invention will out.--

last. by Inany times the usual woven fabric orlhair mat and I am thus enabled to greatl reduce the cost of the usual oil extraction operation of this nature. v i

v In filling th holder with the filtering Inayterialfvvhich -may be hair, jute, cotton or anything suitable for this purpose, the` fibers or strands of such material or fabric formed ltherefrom are drawn lengthwise tirough the holders and then cut ofp and it is of course to be understood that. in the formation of those structures proposed by the invention involving the connection of the holders by nieans of hinge pins or wires, the ends of such hinge pins or wires are be i laterally at the sides of the complete press cloth so as to leave the cloth with substantially sinootli side edges in its finished forni and lock the wires or pins against acci dental displacement- I claim:

l, A press cloth consisting of a flexibly connected series of transversely .ffl.is} aosed hollow metallic holders, andl filtering terial within the hollow of each holder.

2. A press cloth consisting of a series of transversely disposed metallic holders bly connected to one another along their opposite sides, and filtering material within the said holders.

3. press cloth consisting of a flexibly connected series of transversely disposed metallic holders and a filling of filtering niaterial in each holder consisting of strands of the material extending` lengthwise through the holders.

4l. A press cloth consisting of a flexibly connected series of transversely disposed pervious tubes, and filtering material with in the tubes. y

A press cloth consisting of a linked series of transversely disposed pervious metallic holders and filtering material within and through the said holders.

G. n press cloth consisting of series of hingedly connected transversely disposed holders, each formed of a wire helix, and filtering inaterial within and throughout each of the holders. .v

7. A press cloth consisting of a series of transversely disposedholders, each in the form of a flattened wire helix, the convolutions of which holders are flexibly connected along opposite sides of the holders, and lilteringinaterial within each of the holders.

8. A press cloth consisting of a seriesof transversely disposed holders, each in the forrnof a flattened wire helix, the convolutions of each of which holders overlap the convolutions of adjacent holders upon opposite sides thereof, hinge pins extending through the overlapped sides of the several holders and serving to flexibly connect the same, and liltering material disposed within and through the holders as described. `WIlQlIIl/I ANDREW LEE.

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